Stone-cutting tool.



W. F. WITTIGH.

STONE CUTTING TOOL.

APPLICATION rmsn JUNE 4, 1908.

972,969, Patented Oct. 18,1910.

3 SHEETS-SHEET 1.

W. F. WITTICH. STONE CUTTING TOOL.

APrLwA'non IILED 11mm, 1908.

Patented Oct. 18, 1910.

W. F. WITTIGH. STONE CUTTING TOOL.

APPLICATION rum) 31mm, 1908.

972,969; Patented (M118,

3 SHEETS-BK [MW/{asses I my! {01 l I I d ffo 4167 mount' '15 tion by the rotation siierr simxme am) rumLLmG mecnmn company, or ERIE, PENNSYLVANIA,

QORPORATION or Anrzoivarnnmromr.

f sronn-curgrme root.

This invention relates to stone cutting tools, and consists in certain improvements in the construction thereof as. Wlll be hereinafter fully described and pointed outJin the claims. y In a general way, the invention consists in g rotating carriers on cutting heads, and arranging cutting points on the carriers, these" cuttlngpoints eing brou ht into acof the carrler. In the present invention thecutting points are ad- I a rotative cutter is rendered much more e sweepforo cut; 7 as va-nced and retracted from the work. In the preferred construction the points are vioently advanced by a spring so as to effect its full action on the face-belng operated on,

and these points are retracted referabl b b the tracthis we the rotation of the carrier an tion of the carrier on the ace.

fective, especially with certain kinds of rock formation where a blow will create a fracture,'so that the cutting is effected bythe rcmoval-of chips. 4

The invention is illustrated in the accompanying drawings as 3 follows: Figure 1 shows a side elevation of a cutter head. Fig. 2 a bottom view of the cutter. head. Fig. 3' a section on the line3'3 in Fig. 4, the view being from the right of Fig. 4. Fig.- 4 a side elevation partly in section of the carrier the cam plate being removed. Fig. 5 a section .on theline 55 inFi 4. Fig. 6 a side elevation of the cam being from the ri ht of Fi 1 marks the dri g shaft; 2 the cutter head; 3 the shaft supports on the head; 4 a

shaft being fixed in the supports 3; 5 a series of cutters mounted on the shaft 4; 6 a

ers having the widest crating on the outer edges of the aft on which these cutters are mounted. the shaft being mounted on the arm 'Z and fixed there-in. All of these cutconstruction; The cam pl ates, 8 are fixed on the shaft 4 series of inclined cut by the key 9, the hubs of the plates abutting Q Specification of Letters Patent. Application filed June 4, 19 08. Serial No. 436,613.

- which p ate, the" view convenient means for as clearlyshown in Fig. 3. Carriers 13 are journaled on the hubs 8 and operate between theplates 8. These carriers have slots 15 arranged in one face and an overhanging-rim 13 which-extends over the cam plate 8. The-slots 15 pass through this rimand form the perforations 15. These slots form guide ways'for point holders 16', the point holders being sli slot 10. Each holder has a point mounted in its'outer end. A pin Patented Oct. 1a,. 1910..

ingly mounted in the slots and extendmg into --Each holder has a projection or lug 17 which extends into the cam the perforations 15..

19 pro ects from its inner end 'forming a 4 shoulder 20 at the'connection between the pin and the holder 16. A coiled spring 21 is arranged around the pin 19- and tensloned between the, shoulder 20 and the shoulder '22.-

at the end of the slot nearest the center of' the. carrier.

The cam slot 10 has' a cann surface 11 the lug 17- inwardly toward the center of the barrier,

so that the pointis brought to the as the carrier 13 is rotated crowds" I position shown by point-18 in Fig. 3. The a c'am plate is so ositioned on the shaft 4, that the point is lly retracted just as it is brought opposite the face being out. At this oint it reaches a ste 12 whereit passes ofl oi the surface 11, and isfforced outwardly or advancedby the spring 21, so as to deliver a blow on the face being cut.

The carrier 13 is shaft mounted in the carrier 13.

It will be noted that this construction perrotated by traction as the p 4 progresses. To. assist in this movement a series of stationary! points 23 are mits of a series of carriers 13 being arranged 1n close proximity to each other along a common shaft. I prefer that the shaft fbe advanced rotatively as shown as this forms a driving, and also makes a uniform tunnel or shaft.

What I claimas new is:

1. In a stone cutting tech the combination of a rotary carrier; a cutter 7 oint thereon;

carryin the carrier, t

a head andv means for automatically retracting and advancing abruptly the ciitter point as the carrier is rotated.

2. In a stone cutting tool, the combination of a shaft; a campl te'fixed on the shaft v p e. carrier being adapted to e rotated byltraction as the carrier is advanced over a face being cut;

havin swells extending in a radial direction om the shaft; a carrier rotatively mounted with relation to the cam plate of said shaft; a cuttingpoint mounted on the carrier; and means connected with the point i for engaging the cam plate for automatically actuating the point as the carrier is rotated.

3. In a stone cuttin tool, the combination of a shaft 4; a cam p ate fixed thereon, having a hub extending laterally therefrom; -a carrier wheel 13 rotatively mounted on the hub,.and having guide slots in the face thereof;"'point holders slidingly mounted in the slots; points on theho ders; lugs on the holders en aging the cam plate forretracting the holders and points; and springs arran ed in the sockets and tensioned against the older and the socket for advancing the points as the carrier is rotated.

4. In a stone cutting tool, the comblnatlon of a rotary head; a rotary carrier mounted on the head, the axis of the carrier being point as the carrier is rotated. I

' 6. In astone cutting tool, the combination of a rotary head; a shaft carried by the head, the axis of the shaft being-radial to the axis of the head; ,a cam plate fixed on the shaft; a carrier mounted to rotate about the shaft;

a point carried by the carrier; and means connected with the point and engaging the plate for actuating the point as the carrier is rotated.

7. In a stone cutting tool, the combination of a shaft; a' series of cam plg'tes fixed on the shaft having swells exten g i a radial direction; a corresponding series 0 carriers mounted between said ,plates, and bent to rotate about said shaft; points on said carriers; and means connected with said points and engaged by said plates for automatically actuating said points, the points on each carrier being operated independently.

8. In a stone cutting tool, the combination of a shaft; a series of cam plates mounted responding carrier wheels rotatively mounted 1n the hubs between the plates; points slidingly mounted in t e wheels; and means I connected with the po' ts and engagingthe cam plates for automatically actuating the points on one carrier independently of any other carrier. I l f 9. In a stone cuttmg tool, the combination of a rotary head; a plurality of points car;

ried by the head, arranged to-operate'in the general direction of the axis of the head; and a rotating driving means having its axis radial to the axis .of the head for actuating said points. 4

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses;

WILLIAM F. WITTICH.

Witnesses:

K. R. KANE, R. S. Loan.

.55 on.the shaft, each plate having a hub; cor-' 

